Convertible crib



FIG. 1 is a perspective view of the convertible crib according to my claimed design; the vertical slats and the side and rear horizontal bottom rails are not part of the claimed design and are shown in phantom;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a right side elevation view thereof; the left side elevation view is a mirror image of the right side elevation view and is therefore not illustrated.

The back of the headboard and underside of the convertible crib are not illustrated as not being part of the claimed design. 

The ornamental design for a convertible crib, as shown and described. 